I have an exchange server 2010. I have created distribution groups and added the members to these groups. If one of the email address for the distribution group is sales@test.com, will people from the outside be able to send email at that address? Thanks

Yes, unless the Distribution Group is secured.

Hi Gerald, Yes, but you can only mail-enable Universal groups in Exchange 2010. Please refer to this document: Create a Distribution Group http://technet.microsoft.com/en-us/library/bb124513.aspx Best Regards, EvanPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Gerald, Yes, Please refer to these documents: Create a Distribution Group http://technet.microsoft.com/en-us/library/bb124513.aspx Configure Distribution Group Properties http://technet.microsoft.com/en-us/library/bb125178.aspx Best Regards, Evan Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.